Safety throwout for goosenecks of die casting machines



Feb. 27, 1951 H. MORIN 2,543,417

SAFETY THRowoUT FOR GoosENEcKs oF DIE CASTING MACHINES.

Filed July 3, 1947 Patented Feb. 27, 195i SAFETY 'EHROWUT FR GSENECKS FDill] CASTING MACHINES Louis H. Morin, Bronx, N. Y.

Application `luly 3, 1947, Serial No. 758,868

(Ci. lil- 30) lll Claims.

This invention relates to die casting macl'iines employing conventionalgooseneck swingably mounted in the pot of the machine in movement of thenozzle of the gooseneck toward and from the dies. More particularly, theinvention deals with automatically air actuated means for supporting thegooseneck, or goosenecl; operating member, in position, maintaining thenozzle in spaced relation to the dies in the event of the failure ofeither die of the. machine from cornpleting its full closing strokelmovement. ,Still more particularly, the invention includes means forshutting-off supply of air under pressure to the gooseneck as and whenthe dies have not completed a closing movement, thereby preventingdischarge of casting material into im properly closed dies.

The novel features of the invention will be best understood from thefollowing description,

when taken together with the accompanying drawing, in which certainembodiments of the invention are disclosed and, in which, the separateparts are designated by suitable reference characters in each of theviews and, in which:

Fig. 1 is a partial sectional view through the die guides and operatingmechanism of a casting machine, showing part of the safety con trolmechanism of the machine; and

Fig. 2 is a diagrammatic side and sectional view showing the gooseneokmechanism and the control and operating mechanism therefor and alsoindicating the circuit controlling operation of the machine.

My present invention relates to die casting machines of thehydraulically operated type as more clearly illustrated in a companionapplication, entitled Hydraulic Die Casting Machine, Serial No. 753,190,iiled June '7, 1947.

In Fig. l, I have shown at lil part of a frame of a machine, in which isarranged two similar' die guides Il and l2. In the guides ll and i2 areslidably mounted die supporting members I3 and lll supporting on theiradjacent surfaces dies l5 and it which are detachable with respect tothe members i3 and lll, as by way of plates Il and lil, having screws itand 20.

At the outer end portions of the members i3 and lll are heads 2l and 22.Supported on these heads are brackets Evi-2li, in which are adjustablysupported control screws and 25. The screws 25 and 2e operate inconjunction with pistons or plungers 27 and 28 of two control cylinders29, 29', both of which are of the same construction. Therefore, thebrief description of one will apply to the other. Opening 2 into thesides of the cylinders 29, 29', as at 3, are air admissions from an airsupply pipe 3l and, at 32, 32', are shown air discharges, at one end ofthe cylinders communicating with a common pipe 33, which opens into apipe 34, one end of which leads to an air cylinder 35, note Fig. 2, andthe other end extends to one side of a diaphragm 36. Considering thecylinder it will appear that a spring S'l is employed to normally extendthe piston or plunger 223 and, in like manner, the plunger 2l, againstthe control screws 26, 25, respectively, or in the outermost position inthe cylinders. AS the die is moved to closed position, the controlscrews 25, 2d operate to move the pistons inwardly so that their innerends, as at 3,5 at the right .of Fig. l, seal ports 3.9, so as to blockair under pressure in the pipe .3l from entering either ci theadmissions 3l?, 3D.- I.f either die does l not fully close. then airwill be admitted to pass through the respective cylinder and out throughthe pipe E32, 32 to actuate the cylinder 35 and the diaphragm 35, aslater described.

Detachaloly mounted in yoke ends fill, Alli of 3 the frame, arehydraulic cylinders l, tl', in

which are mounted pistons d2, 42. The pistons are adapted to operateupon blocks 4.3, .43' secured in the head end 2l, 22 of the members lf3and lli in movement of the dies into closed position. lThis operation isperformed lby injec tion of oil under pressure through pipes 44, 4 4into the cylinders lil, All. shown, is employed to move the dies intoopen position.

In Fig. l of the drawing, I have shown at IE5 a transfer finger or pinconstituting part of a transfer mechanism d6, the finger or pin beingnormally supported between the dies l5 and l5 so that the casting, as atlll, is for-med thereon, note Fig. 2. Suitable means is vprovided toactuate the mechanism 46 to move the casting tl to trimming and stripperstations, as more clearly disclosed in the application heretoforereferred to.

The supports Il and l2 include a rear plate, as at d8, note Fig. 2,which has an aperture 49 therein for the reception of the nozzle 59 ofthe gooseneck 5l of the machine, so that the nozzle can be brought intoabutting engagement with 'the closed dies for pressure injection ofcasting material into the die cavity in forming the casting di. T -hegooseneck 5I is pivoted in the frame, as seen at e2, and on thegooseneclq is an adjustable screw ,53 which operates upon a roller 5.4isupported at the free end of an arm keyed Other means, not.

to a rocker shaft 56 arranged adjacent the pivot 52.

On the shaft 56 is a long lever i', having diverging arms 5o and 59. Thearm 59 is disposed over the plunger pin B of a piston or plunger Si inthe cylinder The arm 58 carries a roller 62 operating upon a cam 63 onthe main shaft 64 of the machine. The roller G2 is held, at all times,in engagement with the cam S3 by a spring 85, the spring being arrangedupon a hook rod E6, the hook end of which engages a fixed pin or rod 68in the frame of the machine. The spring 85 seats on an arm on thegooseneck and the tension of the spring is adjustably controlled by nutsT8 on the rod 66. The spring SE also serves to control engagement of thenozzle 513 under pressure with the dies during injection of castingmaterial into the die cavity.

It will be understood that the cam B3 allows the gooseneck to be moveddownwardly to bring the nozzle 58 into pressure engagement with the diesand also serves to raise the gooseneck in intermittent movement of thenozzle out of engagement with the dies as a casting is moved to thetrimming and stripper stations in the cycle of operation of the machine.

Supported in the frame of the machine is a shaft Il, note Fig. 2, gearedto the shaft 84 through gears which are indicated by dot dash lines atl2, 73 and 14. On the shaft 'H is a cam 15 adapted to operate theplunger or piston 'i6 of a control valve T. The valve 'il' controlstransmission of oil under pressure to the pipes 44, 44 and thus to thehydraulic cylinders 4l, 4

in operating the plungers or pistons 42, 42. In Fig. 2, I havediagrammatically illustrated at 'I8 the hydraulic pump which pumps oilfrom a suitable tank, not shown, into the valve 'l1 through port I9,from which it is discharged through port 80, communicating with bothpipes 44, 44'. At 8| is shown a return or overflow for return back tothe oil tank. A spring 82 normally supports the plunger I5 in engagementwith the cam '15.

In Fig. 2 I have also diagrammatically shown the circuit wires 83, 84 tothe electric motor, diagrammatically indicated at 85 in the drawing. Inthe circuit wires is a switch 86 actuated by the plunger pin 8l' of thediaphragm 36. In the circuit of the wires 83, 84 is an electricallyactuated valve 88 which controls the supply of air to the gooseneckthrough the air admission pipe indicated at 89. This air serves topressure discharge casting material from the gooseneck into the diecavity.

From the foregoing, it will be apparent that, in normal operation of themachine, the air cylinder 35 and diaphragm 35 are inoperative insofar asinterfering with operation of the machine is concerned. In the eventthat either one of the dies l5, iS fails to complete its full closingstroke motion, then air is permitted to pass into one of the pipes 32,32 to actuate both the piston 6! in the cylinder and th-e pin 8? of thediaphragm 3S. The latter will trip the switch 86, stopping the electricmotor 85 and also checking the valve 88 to prevent admission of air tothe gooseneck 5|. `Admission of air into the cylinder 35 will cause thepin G8 to be raised, to swing the gooseneck into its inoperativeposition with the nozzle 58 spaced with respect to the dies and toretain the gooseneck in this position until such time as necessaryrepair to the die actuating mechanism or die is made.

In machines of the kind under consideration, there are times whenforeign matter presents itself between abutting surfaces of the dies,preventing th-e dies from fully completing their closing stroke motionand, to avoid injection of the casting material into open dies, thesafety control and gooseneck throw-out mechanism is provided. It will beapparent that a relatively simple and, yet, mechanically fool-prooicontrol is maintained in operation of machines of the kind underconsideration.

Having fully described my invention, what I claim as new and desire tosecure by Letters Patent is:

l. In die casting machines employing a gooseneck for discharge ofcasting material under pressure into the cavity o1 a pair of diesthrough the nozzle of the gooseneck, the combination including a pair ofdies movable toward and from each other, a gooseneck movable into andout of engagement with said dies, automatically actuated means formaintaining the nozzle of said gooseneck in spaced relation to the diesin the event that either die fails to complete its full closing strokemovement, a cam actuated lever controlling movement of the goosenecknozzle toward and from the dies, and said rst named means comprising anair actuated plunger operatively engaging said lever to support the sameand the gooseneck with said nozzle in spaced relation to the dies.

2. In die casting machines employing a gooseneck for discharge ofcasting material under pressure into the cavity of a pair of diesthrough the nozzle of the gooseneck, the combination including a pair ofdies movable toward and from each other, a gooseneck movable into andout of engagement with said dies, automatically actuatsd means formaintaining the nozzle of said gooseneck in spaced relation to the diesin the event that either die fails to complete its full closing strokemovement, a cam actuated lever controlling movement of the goosenecknozzle toward and from the dies, said rst named means comprising an airactuated plunger operatively engaging said lever to support the same andthe gooseneck with said nozzle in spaced relation to the dies, meansactuated by the dies controlling supply of air to said plunger, and saidlast named means actuating means controlling stoppage of operation ofthe machine.

3. In die casting machines employing a gooseneck for discharge ofcasting material under pressure into the cavity of a pair of diesthrough the no;zle of the gooseneck, the combination including a pair ofdies movable toward and from each other, a gooseneck movable into andout of engagement with said dies, automatically actuated means formaintaining the nozzle of said gooseneck in spaced relation to the diesin the event that either die fails to complete its ull closing strokemovement, a cam actuated lever controlling movement of the goosenecknozzle toward and from the dies, said rst nam-ed means comprising an airactuated plunger operatively engaging said lever to support the same andthe gooseneck with said nozzle in spaced relation to the dies, meansactuated by the dies controlling supply of air to said plunger, saidlast named means actuating means controlling stoppage of operation ofthe machine, an electrically actuated valve controlling supply of airunder pressure to the gooseneck for discharge of casting materialthrough said nozzle, and said last named means controlling actuation ofsaid 5 valve to shut-off supply of air to the gooseneck upon stoppage ofmachine operation.

4. In a die casting machine the combination including a pair of diesmovable toward and from each other, a gooseneck having a dischargenozzle, means swingably supporting the gooseneck to move the nozzletoward and from said dies, means comprising a cam actuated lever forswinging said gooseneck, an air actuated plunger operatively engagingsaid lever to support the 31= nozzle of said gooseneck in spacedrelation to the dies, to be independent of cam operation of said lever,and means supported on each die controlling supply of air to saidplunger, whereby the failure of either die to complete its full strokemovement will cause said plunger to be actuated to support said lever inposition maintaining the nozzle in spaced relation to the dies.

5. In a die casting machine the combination including a pair of diesmovable toward and from each other, a gooseneck having a dischargenozzle, means swingabiy supporting the gooseneck to move the nozzletoward and from said dies, means comprising a cam actuated lever forswinging said gooseneck, an air actuated plunger operatively engagingsaid lever to support the nozzle of said gooseneck in spaced relation tothe dies to be independent of cam operation of said lever, meanssupported on each die controlling supply of air to said plunger, wherebythe failure of either die to complete its full stroke movement willcause said plunger to be actuated to support said lever in positionmaintaining the nozzle in spaced relation to the dies, and said lastnamed means being adjustable.

6. In a die casting machine the combination including a pair of diesmovable toward and from each other, a gooseneck having a dischargenozzle, means swingably supporting the gooseneck to move the nozzletoward and from said dies, means comprising a cam actuated lever forswinging said gooseneck, an air actuated plunger operatively engagingsaid lever to support the nozzle of said gooseneck in spaced relation tothe dies to be independent of cam operation of said lever, a valvecontrolling supply of air under pressure to said goosenecl: in dischargeof casting material through said nozzle, and means actuated by each diecontrolling operation of said plunger and said valve to maintain the fnozzle in spaced relation to the dies and to shutoff supply of air tosaid gooseneck in the event that either die fails to complete its fullclosing stroke movement.

7. In a die casting machine the combination including a pair of diesmovable toward and from each other, a gooseneck having a dischargenozzle, means swingably supporting the gooseneck to move the nozzletoward and from said dies, means comprising a cam actuated lever forswinging said gooseneck, an air actuated plunger operatively engagingsaid lever to support the nozzle of said gooseneck in spaced relation tothe dies to be independent of cam operation of said lever, a valvecontrolling supply of air under pressure to said gooseneck in dischargeof casting material through said nozzle, means actuated by each diecontrolling operation of said plunger and said valve to maintain thenozzle in spaced relation to the dies and to shut-off supply of air tosaid gooseneck in the event that either die fails to complete its fullclosing stroke movement, and other means actuated by the last namedmeans for stopping operation of the machine.

8. In die casting machines employing a gooseneck, a nozzle on thegooseneck through which casting material is injected into the cavity ofa pair of dies movable toward and from each other, means pivotallysupporting the gooseneck, means for actuating the gooseneck to swing thesame on its pivot in movement of the nozzle toward and from the die,means automatically actuated upon the failure of the machine to performat least one of its functions for blocking swinging movement of saidgooseneok and maintaining the nozzle thereof in spaced relation to thedies.

9. In die casting machines employing a gooseneck, a nozzle on thegooseneck through which casting material is injected into the cavity ofa pair of dies movable toward and from each other, means pivotallysupporting the gooseneck, means for actuating the gooseneck to swing thesame on its pivot in movement of the nozzle toward and from the die,means automatically actuated upon the failure of the machine to performat least one of its functions for blocking swinging movement of saidgcoseneck and maintaining the nozzle thereof in spaced relation to thedies, means for ejecting casting material from the gooseneck throughsaid nozzle, and said automatically actuated means controlling said lastnamed means to prevent discharge of material from the nozzle when thenozzle is maintained in spaced relation to the dies.

10. In a die casting machine havingl a nozzle that is moved intoengagement with a pair of movable dies for discharging casting materialunder pressure into the cavity formed by said dies when said dies are inclosed position, an air-operated safety throwoutincluding lever meansfor maintaining the nozzle in spaced relation to the dies, air-operatedmeans for actuating said last-mentioned means and control means forcontrolling the supply of air to said actuating means, said controlmeans being actuated by said dies to release air to said actuating meansupon failure of either of the dies to complete its closing movement.

1l. In a die casting machine having a nozzle that is moved intoengagement with a pair of movable dies for discharging casting materialunder pressure into the cavity formed by said dies when said dies are inclosed position, an air-operated safety throwout including lever meansfor maintaining the nozzle in spaced relation to the dies, air-operatedmeans for actuating said last-mentioned means, air-operated means forstopping the machine, and means for controlling the supp-ly of air toboth of said airoperated means, said control means being actuated bysaid dies to release air to said air-operated actuating means andmachine stopping means upon failure of either of the dies to completeits closing movement.

12. In a die casting machine having a nozzle that is moved intoengagement with a pair of movable dies for discharging casting materialunder pressure into the cavity formed by said dies when said dies are inclosed position, an airoperated safety throwout including lever meansfor maintaining the nozzle in spaced relation to the dies, air-operatedmeans for actuating said last-mentioned means, air-operated means forstopping the machine, air-operated means for discharging castingmaterial through the nozzle to the dies, and control means forcontrolling the supply of air to each of said air-operated means, saidcontrol means being actuated by said dies to release air to each of saidair-oper- 7 ated means upon failure of either die to complete itsclosing movement.

13. In die casting machines employing a gooseneck for discharge ofcasting material under pressure into the cavity of a pair of diesthrough the nozzle of the gooseneck, a cam actuated lever for moving thegooseneck to bring the nozzle thereof into and out of engagement Withthe dies, an air actuated plunger pin cooperating with said lever formaintaining the nozzle of the gooseneck in spaced relation to the diesin the event that eithei` die fails to complete its full closing strokemovement, control valves actuated by the dies controlling supply of airto said plunger pin, and said last named valves controlling supply ofair to a device stopping operation of the machine.

14. In die casting machines employing a gooseneck for discharge ofcasting material under pressure into the cavity of a pair of diesthrough the nozzle of the gooseneck, a cam actuated lever for moving thegoosenecl: to bring the nozzle thereof into and out of engagement withthe dies, an air actuated plunger pin cooperating with said lever formaintaining the nozzle of the gooseneck in spaced relation to the diesin the event that either die fails to complete its full closing strokemovement, control valves actuated by the dies controlling supply of airto said plunger pin, said last named valves controlling supply of air toa device stopping operation o the machine, an electrically actuatedvalve controlling supply of air under pressure to the gooseneck fordischarge of casting material through said nozzle, and said devicecontrolling the oircuit to said electrically actuated valve to shut-oirsupply of air to the gooseneck upon stoppage of the machine operation.

LOUIS H. MORIN.

REFERENCES CITED UNITED STATES PATENTS Name Date Jobst Apr. 3, 1945Number

